Furnace



FURNACE.

Patented Jan; 14, 1890 w W k W M M WU j I l W .3 m a m v a c j I v I r J n a w Q j I z a v (No'Mode1.)-

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UNITED STATES PATENT OFFICE.

AUGUST F. SLANGERUP AND ZACHERY T. HEAF, OF NEW ORLEANS,

LOUISIANA.

FURNACE.

SPECIFICATION forming part of Letters Patent No. 419,478, dated January 14, 18 90.

Application filed 1M3 6, 1889. Serial No. 809,843. (No model."

To all whom it may concern:

Beit known that we, AUGUST FERDINAND SLANGERUP and ZAOHERY TAYLOR HEAP, citizens of Denmark and the United States, respectively, residing at New Orleans, in the parish of Orleans and State of Louisiana, have invented certain new and useful Improvements in a Hot-Blast Furnace for Burning Bagasse, Sawdust, Tan-Bark, or other Fuel; and we do declare the following to be a full, clear, and eX- act description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

- furnaces a grate may be omitted.

Our invention relates to certain novel and valuable improvements in furnaces which are especially designed for burning bagasse, sawdust, tan-bark, or other fuel, Which improvements will be fully understood from the following description and claims, when taken in connection with the annexed drawings, in which- Figure 1 is a side sectional elevation of our improved furnace as it would appear by removing a side wall. Fig. 2 is a horizontal sectional View of the furnace, taken in the planes indicated by the course of the dotted line x at on Fig. 1, the boilers and engine being omitted. Fig. 3 is a vertical cross-section through the furnace, taken in the plane indicated by dotted line y g on Fig. 2. Fig. at is a vertical section through one of the side walls, showing the air-chamber and its tuyeres.

Similar letters refer to similar parts throughout the several views.

Referring to the annexed drawings by letter, A designates the furnace, which is preferably constructed of fire-brick and provided at one end with a combustion-chamber C, formed by the two longitudinal side walls a a, the end wall G, and the bridge-wall H. The combustion-chamber O O is provided with fire-doors I I, and it is preferably provided with a horizontal grate L, although in some Surrounding the said combustion-chamber and in the walls a a G H isan air-chamber E, which communicates with a hollow base E in the hearth or floor of the combustion-chamber a. (Shown in Figs. 1 and 3.)

The chambers E in the side walls a a are WVhen a grate L is employed, as shown, the heated-air jets are introduced into the chamber 0 both above and below the grate, so that'a strong draft is produced.

B B designate hot-air trunks or pipes which communicate by means of branches B B with is in the bridge-wall H of the furnace, and which also communicate by means of a single pipe D with the casing F of a rotaryfan or blower driven by a suitable engine. The horizontal pipes 13 B are arranged in the horizontal outflue J of the furnaceAbeneath the steam-boilers A, so that the air passing from the fan to the chambers E E is subjected to the heat of the products of combustion as they pass from the chamber 0 through said flue J'. The walls surrounding the combustion-chamber become highly heated; consequently the air which is forced into the chambers E E will be subjected to this heat and be injected through the tuyeres K into the chamber 0 and among the incandescent fuel therein in a highly rarefied and heated state, thus producing a rapid combustion of the fuel.

It will be observed that not only are the hollow walls a provided with air-jets K, but that the hollow walls G and H are similarly provided. y

We are aware that the severalparts of our device are old when separately considered, and that the most of them have been used in connection with each other; but We are not aware that all of the parts have been used in the construction and combination herein specifically pointed out.

Having described our invention, whatwe claim is The furnace A, having the fire-chamber 0, formed from the side walls a a, the end wall G, and the bridge-wall H, in combination with the air-chamber E in the four vertical walls of the combustion-chamber, the hollow base that portion of the vertical air-chamber which r I i E in the hearth of the combustion-ehamber and in communication with the chambers E, the tuyeres K in the side walls a a, the blowereasing F and blower therein, the single pipe D, leading from the blower, the hot-air pipes 13 B, leading from the pipe D, and the branch pipes 13 to the hollow base of the combustionehamber, the said pipes 13 B being arranged in the horizontal outflue J of the furnace and beneath the steam-boilers, all substantially IO as specified.

In testimony whereof We afiix our signatures in presence of two Witnesses.

AUGUST F. SLANGERUP. ZACIIERY T. IIEAP. Vitnesses:

JOHN A. ADAMS, PERCY -D. PARKS. 

